MESON Chess Problem Database

Problem Display
PID: 67133 (8/Bp6/3pbQ2/R1n3K1/2pNk3/2Pr1p2/5pn1/1B1R4 w - - 0 1)

Avner, Uri

Sp. Prize, Israel Ring Ty., 1992-1993

8/Bp6/3pbQ2/R1n3K1/2pNk3/2Pr1p2/5pn1/1B1R4

#2

8 + 10

17424 Close Encounters with the Chess Pieces (Avner) 2021

SOLUTION

  • SOUND
  • Sets
    • 1...Ke3
      • 2.Qxf3#
    • 1...Kd5
      • 2.Qxe6#
    • 1...Sb3
      • 2.Qxf3#
      • 2.Qxe6#
    • 1...Sa4
      • 2.Qxf3#
      • 2.Qxe6#
    • 1...Sa6
      • 2.Qxf3#
      • 2.Qxe6#
    • 1...Sd7
      • 2.Qxf3#
  • Tries
    • 1.Sb3?
      • threat
        • 2.Qd4#
      • 1...Ke3
        • 2.Qxe6#
      • 1...Sxb3
        • 2.Qxe6#
      • 1...Kd5!
    • 1.Sb5?
      • threat
        • 2.Qd4#
      • 1...Ke3
        • 2.Qxe6#
      • 1...Sb3
        • 2.Sxd6#
        • 2.Qxe6#
      • 1...Kd5!
    • 1.Sf5?
      • threat
        • 2.Qd4#
      • 1...Sb3
        • 2.Sg3#
        • 2.Sxd6#
        • 2.Qxe6#
      • 1...Kd5!
    • 1.Bxd3+?
      • 1...Ke3
        • 2.Sc2#
        • 2.Qxf3#
      • 1...Kd5
        • 2.Qxe6#
      • 1...Sxd3
        • 2.Qxf3#
      • 1...cxd3!
    • 1.Qf5+?
      • 1...Ke3
        • 2.Qxf3#
      • 1...Bxf5!
  • Keys
    • 1.Sc6!
      • threat
        • 2.Qd4#
      • 1...Ke3
        • 2.Qxe6#
      • 1...Kd5
        • 2.Qxf3#
      • 1...Sb3
        • 2.Qxe6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 2
    • ADDED MATES = 1
    • REMOVED MATES = 1
  • Sets
    • K(f);N_SPINR(c),P-FLIGHT::QAR1(G),XP(d)
    • K(f);N_SPINR(c),P_SPINS(g),S_FLIGHT::QAB1(G),XB(i)
    • S(g);::QAB1(G),XP(d)
  • Tries
    • Try
      • S(D);
      • Threat
        • QAR1(G)
      • Vars
        • K(f);N_SPINR(c),P-FLIGHT,P_SPINS(g)::QAR(G),XB(i)
        • S(g);N_GUARD,XS(D)::QAR2(G),XB(i)
      • Refutation
        • K(f);P_SPINS(g),S_FLIGHT
    • Try
      • S(D);
      • Threat
        • QAR1(G)
      • Vars
        • K(f);N_SPINR(c),P-FLIGHT,P_SPINS(g)::QAR(G),XB(i)
      • Refutation
        • K(f);S_FLIGHT
    • Try
      • S(D);
      • Threat
        • QAR1(G)
      • Refutation
        • K(f);P_SPINS(g),S_FLIGHT
    • Try
      • B(A);CHECK,XR(c)
      • Vars
        • K(f);P_SPINS(g),S_FLIGHT::QAB1(G),XB(i)
        • S(g);XB(A)::QAB1(G),XP(d)
      • Refutation
        • P(e);XB(A)
    • Try
      • Q(G);CHECK
      • Vars
        • K(f);N_SPINR(c),P-FLIGHT::QAR1(G),XP(d)
      • Refutation
        • B(i);XQ(G)
  • Actual
    • S(D);
    • Threat
      • QAR1(G)
    • Vars
      • K(f);N_SPINR(c),P-FLIGHT,P_SPINS(g)::QAR(G),XB(i)
      • K(f);P_SPINS(g),S_FLIGHT::QAB(G),XP(d)
      • S(g);N_GUARD::QAR2(G),XB(i)
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